hi there
in essence there is very little difference between tear stain away and Angels eyes. The former might have a longer shelf life because of the bha (an artificial vitamin E). Personally I would go for the one that is cheaper- given that they are the same product.
Either should work as the active ingredient is the narrow spectrum antibiotic- Tylosin.
Tylosin is generally safe for dogs but fatal to some animals such as horses.
I would expect either to start working in just under three weeks.
If you use either then in the event of blood tests on your dog please tell the vet as they will give screwy results.
I hapilly used Angels eyes until it was outlawed on our side of the "pond", ie europe.
Although I loved the product i was always a little disappointed by the fact that both makers underplay the antibiotic element. Although i never used Angels Glow I considered their blurb on their site to be a tad more honest.
If you want some unbiased info about tylosin then go to
bichon hotel. They no longer sell it but have some useful info.
You might find that your dog doesn't like the taste, if this happens then introduce it to the diet by adding it to your dog's drinking water