I finally talked to Pirate's vet this afternoon. Her thryoid result is normal, which is good, except that it doesn't explain why she's loosing her fur!
Candace doesn't think it's Cushings as she doesn't show any other typical signs. She thinks it's either an allergy or melatonin responsive. We discussed at length the pros and cons of going any further with allergy testing. I might get a bag of the hypo-allergenic food to try, but Pirate already eats a food that is free from the big allergens--no grain, no corn, ect. She does not respond well to changes in her diet. She's not itchy or scratching herself raw. If she gets worse or does get itchy, I'll get a skin biopsy done. Candace thinks she could do it with a local since we'd both rather not put Pirate under a general.
I'm thinking it's the melatonin. Candace said it's not terribly common, but does occur up here, especially in the huskies. They loose most of their coats in the summer, when there is way too much light and it comes back with the darkness in the fall. Pirate's coat was great all winter--thick, soft, shiny. It's only since it got sunny that she's been shedding excessively. Basically, it can't be treated. She might need some sunscreen on her skin if her fur gets very thin and she might need to stay indoors on extra warm days. The husky double coat insulates from heat as well as cold. We don't get many of hot days anyway and Pirate would have no objection to staying on her bed all day!
We are changing her meds a bit. I've noticed in the last couple weeks that she seems to be having some neurological symptoms. She's not always aware of where her back end is anymore; she trips over small rocks, tree roots ect in the yard and her balance sucks. Candace said normally she's recommend Prednisone, but Pirate is already on Metacam. The two can't be mixed and I don't want to mess with her pain control if I don't have to. So we are going to do a trial of gabapentin instead. It's a seizure med at higher doses, but also helps with chronic pain and nerve degeneration issues. Stuart's actually been prescribed it before for his chronic back pain! If it doesn't help, she'll go on the prednisone.
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