Hi Jan, The flea dirt makes me think of tapeworms which my vet said results
in an animal losing weight (more so than any other type of parasite.) Also
tapeworm segments do not always show up in the stool & fecal checks do not
always detect tapeworms, even if animal is infected with them. She routinely
prescibes tapeworm treatment for my collie, sheltie & 3 cats several times a
year (at my request) because I "know" that with all the hunting my 3
"wildcats" do, and sharing food dishes and all, that any or all of them are
constantly subject to infestation.
I would also immediately begin monthly treatment w/ advantage or frontline to
Oil in food is a good idea- I add it to my cats', dogs', and horses' feed
daily. It does add calories, as well as shine to the coat, and constipation
preventative in older pets. But I do not believe this will solve the root of
your older collie's weight loss problem. Problem weight loss could result
from other causes, but based on info you gave I would first try flea and
Hope this helps the old guy.
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