i know that this is probably a stupid question... but i am about to purchase a shampoo and spray for my itchy, yeasty, losing patches of fur- dogs. i have noticed that both the bully and kelpie are starting to use their back legs to scratch at their ribs, especially when i am about to take them for a walk... does this mean anything?

I am looking in to the products recommended by people on this board and I have noticed that some have recommended the 'horse' version of the shampoo or spray...

am i suppose to get the "horse formula strength" in order to kill the yeast,fungus, itchiness, and bacteria??? or should i stick with the dog version?

i was on amazon, thinking about getting the eqyss micro tek shampoo, calm coat spray, and malaseb wipes so i could have everything ready in my medicine cabinet (might as well stock up now so i could get cheaper shipping)... or maybe i will just start with shampoo and go from there. thanks!