I have Tylan from the Vet - I have it for TJ - if and when his IBD acts up. Tylan is very safe.
I also bought the 'large bottle' of Angels Eyes, b/c Roxy was tearing sooooo much and red tear, the whole nine yards! Anyway, I bought the big bottle and when all was said and done with shipping it cost me $80. I only used it one day for Roxy, b/c it was the same time that I decided to switch TJ and Roxy to eat Nature's Variety Raw. Ever since I switched their food - and since I stopped giving them Nupro (just like Missing Link) her tears turned clear and just about stopped running like a faucet.
So, I can't say whether or not the Angel Eyes work or not. For Roxy, I believe the Nupro was the problem.
Anyway, I have the 'big' bottle of Angel Eyes if anyone wants to buy it:
$55 including shipping
(it cost me $80 with shipping - I only used 1/4 of teaspoon for one day - so the bottle is full

)
PM if anyone is interested in buying it...