Hi - Ecco (15 yr male DSH) is hyperthyroid. Will likely be on vet meds in near future, but for now is on Thyroid Support Gold (PetWellbeing) which is great. However he's sneezing (messy) more and more after few mos. on the stuff, so I stopped it for a couple of days with big return to thyroid issues - but sneezing got better. Put him back on the Gold (whew!) til further notice, but til I can afford the vet (then) wonder if anyone knows what to give an allergic cat... antihistamine? The Gold is made up of lots of diff. herbs, so things make sense, but... Thx if you have any answers.