Thank you for the reply. I have him 8 years, since he was a few weeks old (unwanted male kids from a dairy herd) castrated when I got them. Toggenburg x saanen. I'm in the Dublin mountains in Ireland. They havent been exposed to other goats since I got them. There are deer that come into the field from time to time.
The 10 acres he is on is mainly grass but also shrub, gorse, bracken etc. I have horses also so ragworth removal always up to date. So as far as I know the only thing he could be eating that is not good for him is bracken, but he doesnt tend to hang out up higher on the hill in the brackeny areas.
He has access to a goat mineral lick, I had been giving him my horse coarse mix and alfalfa but when he went off that I went and bought the sheep mix in the hope he would eat it. (I thought alfalfa would be the best option to give him because of more protein, but I do have straw chops I can try him on - eitherway he hasnt been eating the alfalfa)
My vet is an equine and bovine specialist with a good bit of experience in sheep too. He readily admits to having little experience with goats as so few people have them, but honestly I dont know of any specialist goat vets in my county or the neighbouring counties. I havent had bloods done or a worm fecal count done (mainly because my vet hadnt suggested it)
Definitely not heat stroke/sun stoke in Ireland! and he has access to a goat house for shelter and fresh water. Monitoring the fresh water intake is a problem as I have streams and automatic drinkers dotted around the 10 acres. so to restrict that I would have to isolate him in a very small paddock with short grass. I'm reluctant to do that as he will nibble on the longer grasses out on the hill.
The weight loss has been gradual. He is a poor dooer from time to time, but usually if I see him drop weight he has a good appetite normally and would hoover up whatever feed I gave to him and the problem was fixed.
I havent checked his teeth but I assume (possibly incorrectly!) that if he can munch on carrots no problem then there cant be that much wrong with his teeth.
I have willow and ivy in another field that I can try him on if you think it can help. He's definitely not getting bullied by his pal, he is the alpha goat and still manages to be alpha despite feeling so poorly.
I must check out to see can he pee ok! I hadnt noticed or thought to check.
I do have tumeric (again for the horses!) so I must see will he try some of that. With black pepper I assume.
Thanks again for taking the time to reply