I have been fighting this hair problem for about 3 months or so. I'm starting to think maybe I ts an allergY to the HHBs. It didn't start until I started her on these blocks. Also she is scratching her ears alot. I don't know what ear mites look like bot her ears look pretty clean. I might say the right ear has a clear yellow crystal type substance, a small amount, in the ear. Is this what mites are? She has seen the vet and I have used Revolution on her, did a skin scraping that was negative and then about a week and a half ago used Lime plus dip that I got from the vet. How long does it take after using that for hair regrowth? She is a picky eater and doesn't care for greens much but she does get her HHBS twice a day, sometimes 3 a day. I give her 2 hazel nuts in the morning and only then will she go and eat some of her greens. She is 7 years old. She has gone from 1.86 lbs this year to 1.62 lbs so far. The vet wants her at 1.2 lbs. I am going to try to attach some pics but if anyone knows if this could be an allergy to HHBS that would resolve alot. ]