Hyperoestrogenism - Dog

Females

Ovarian Imbalance Type 1 Seen in adult bitches who present with alopecia and increased pigmentation round the perianal, perigenital and axillary areas. Caused by:

• Cystic ovaries.
• Ovarian neoplasia.

Males

Dogs present with bilaterally symmetric alopecia, similar hyperpigmentation to that seen with female dogs with ovarian imbalance, loss of libido and gynaecomastia. The dogs become attractive to other male dogs. Caused by:

• Sertoli cell tumour.
• Male feminising syndrome.