Sorry for not getting back sooner, we're clearing land and the big tree cutters came a day early! Been busy outside.
Vet RX is basically like Vicks. It may help with symptoms, but it's not really going to treat anything.
For the Safeguard, you got the Aquasol, which is concentrated to specifically be used by mixing in the drinking water. That isn't my preferred way to do it since sick birds may not drink well enough to get enough. I prefer to use the oral solutions (the goat wormer or the horse paste) which are usually 10% solutions, meaning they have 100 mg/ml, which is 1/2 the strength of that one you got. I do not know if that particular formulation is safe to give orally, I simply don't know. Since it's not labeled for that, I can't say I would. It could be much harder to dose since the amount will be smaller (many times oral medications are formulated the way they are to make it simpler to dose).
The dose orally of the 10% solutions is .23 ml per pound of body weight to each bird, once a day for 5 days in a row. So you would be giving half of that if you used what you bought, orally.
If you use it mixed in water, as the instructions say, I would just make very sure that any questionable birds are given some of the medicated water several times through out the day orally, to make sure they are drinking it, and may sure they have no access to any other water during treatment. The risk of under dosing is ending up with parasites that are resistant to the medication.
