Check your dogs mouth thoroughly too, look for bad plaque build up or hair. I pull hair out of Molly's gum line everyday. I've also found hair in the pallet in all my dogs at one time or another.
She is 6 yrs old. She will be 7 in September. I feed her Dimond Naturals with a little blue can food mixed in. I have only had her about a week now. She was a rescue.