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This article provides an overview of conditions that can cause hair loss in dogs and cats and offers guidance on diagnostic approaches, but it presents no new research findings.

This review discusses alopecia areata as a model for studying tissue-directed autoimmune diseases and reports no new clinical findings.

This study observed that alopecia areata can be induced and serially transferred in C3H/HeJ mice using skin grafts, providing a useful model for studying the disease in humans.

This study found that overexpression of the mineralocorticoid receptor in a mouse model led to premature epidermal barrier development, keratinocyte apoptosis, and postnatal alopecia, indicating new roles for MR signaling in skin physiology.

This review discusses the multiple layers of environmental controls on hair stem cell homeostasis and suggests that targeting these layers could offer safer regenerative medicine therapies without directly using stem cells.

This study found that the vitamin D receptor is crucial for initiating the postnatal hair follicular cycle in mice, preventing alopecia associated with its inactivation.

In this study, iNKT10 cells were found to play a significant role in preventing and treating alopecia areata in a humanized mouse model, suggesting these cells could have potential in managing related autoimmune disorders.

This review discusses recent advances in understanding the pathogenesis of autoimmune alopecia areata and reports no new clinical results; it highlights potential for developing more effective treatments.

The exact cause of growth hormone-responsive alopecia in dogs is unclear.

In this study, PTH-CBD effectively prevented and partially reversed chemotherapy-induced alopecia in mice, with pretreatment offering a better cosmetic outcome compared to therapeutic administration after hair loss onset.

This study found that dermoscopy can identify distinctive features in canine pattern alopecia, such as hair shaft thinning and pigmentation patterns, which may aid in diagnosing this and potentially other skin disorders.

Among Australian fur seals at one colony, this study found that alopecia, primarily affecting juvenile females, is linked to hair shaft fractures associated with low tyrosine and zinc levels, as well as higher pollutant exposure.

This study indicates that targeting the PTH/PTHrP receptor may potentially stimulate hair growth, particularly for chemotherapy-induced alopecia, as observed in hairless and cyclophosphamide-treated mice.

This study found that maternal iron-restricted diets increased alopecia incidence in IL-10-deficient mouse pups with mast cells, implicating mast cells as potential effectors in this process.

This study found that administerating 10 mg/kg intramuscular fulvestrant did not stimulate hair regrowth in Pomeranian dogs with alopecia X, though higher doses may warrant further investigation.

This report presents evidence that alopecia areata incognita may be a possible mechanism of hair loss in patients with Cronkhite–Canada syndrome.

A horse's sudden hair loss was caused by an allergic reaction to a coat conditioning powder.

This study found that in dogs with post-clipping alopecia, microneedling with platelet-rich plasma may induce more rapid hair regrowth compared to microneedling alone, though results were similar by six months.

In this study, researchers documented the first instance of alopecia in bats within the Puebla region, specifically affecting two Artibeus jamaicensis and one Choeronycteris mexicana, possibly linked to environmental stress from human activities interfering with their nutrition.

In this study, researchers found that CD4 T cells from the skin draining lymph nodes of mice with alopecia areata can transfer the disease to recipient mice, highlighting the key role of these cells and their interaction with CD8 T cells in the disease's development.

This case report describes a 55-year-old woman with alopecia areata whose condition improved rapidly and did not recur after the surgical resection of a thymoma, suggesting a potential immunological link between alopecia areata and thymoma that warrants further investigation.

This review discusses natural remedies and nanoparticle formulations for alopecia management and reports no new clinical results, emphasizing potential benefits of herbal treatments over synthetic therapies.

This study described clinical manifestations such as alopecia and hyperpigmentation in male dogs with hypoandrogenism, suggesting a need for further research on these endocrinopathies in animals.

This study identified a specific genetic variant in the CCHCR1 gene that may contribute to alopecia areata through impaired keratinization, suggesting an alternative mechanism beyond autoimmune causes.

This study suggests that dermoscopy provides additional insights for diagnosing pattern alopecia in short coated dogs, beyond what is visible through standard dermatological examination.

This study found that treatment with PTH-CBD stimulated hair growth in mice with alopecia areata, with increased levels of beta catenin indicating activation of the Wnt pathway.

This case report diagnosed an 8-year-old girl with trachyonychia and secondary onychomycosis, finding that spontaneous improvement is common, making specific therapy often unnecessary despite treatment challenges with associated fungal infections.

This study observed that young rat models, with naturally synchronized hair growth phases, developed total alopecia after chemotherapy and may serve as a better model for testing CIA protective treatments compared to adult rats.

This study found that in a rat model of alopecia, combining low-level laser therapy with Neoptide treatment resulted in better hair regrowth compared to either treatment used alone.

Alopecia in animals can be hereditary, congenital, or acquired, with treatments and outcomes varying widely.