We adopted a golden from a rescue shelter almost 4 years ago. We think she was a breeder in a puppy mill since she was 7 when we got her and hadn't been spayed. Although she has a very sweet temperament, she's been difficult because, apparently, most of her life was spent in a crate and she was not house broken. After working with her for about 18 mos. she's doing much better but recently she's developed some strange symptoms. A few weeks ago, we had her groomed and when we picked her up her coat was mottled - almost like a pinto pony. It was a big contrast from her usual coat. She has also started eating grass; not just a blade or two, but huge mouthfuls. Almost like a cow grazing in the field. Occasionally, she will vomit. We recently had her treated for an eye infection and then what might have been kennel cough. Those appointments and a check up for her meds - she takes a low dose thyroid pill twice a day - have set us back a few hundred bucks so I hate to take her back to the vet again if these symptoms are no big deal. Any ideas on what might be going on with her?