I have purchased both goat drench (8oz pump) and selenium-e gel from PBS livestock supply. Also probios gel. Upon reading the labels I noticed that both contain Sodium selenite and vit e of differing levels. My question is can you use both products at the same time as the drench contains other vit. and minerals that might help balance and aid absorption of the supplements or am I risking overdose on vit. e and selenium? My herd is showing signs of defiency and will kid the end of April. I am hoping to boost/ balance this out prior to kidding as well as in kids as they are born. Dosage suggestions and dosing schedule as well. Every 5 weeks? For how long? Following dosage on bottle? Thanks in advance! FYI we are northeastern Kennebec County in Maine around .2 or .3 on the selenium map I think.