many larger animals self medicate and apply external anti pest substances I watch my horse roll and rub herself on bayberry shrubs,of which there are many in her 10 acre paddock,the bay berry is very aromatic and the seeds are so wax covered asnto be a useable source of candle wax. The paddock is also full of many many kinds of bees wasps and hornets,which I watch closely to see what they eat and where they shelter,with the idea to learn.how to create ideal habitat in areas with struggling bee populations,got a few pointers from watching,but the tid bit above is trurly facinating