Hi. First, your tiel does not need his wings clipped every other week,Usually twice a year or a bit more often for light bodied birds like tiels is enough.Can he fly at all?With regard to your tiel getting on Ty,s shoulder,I see no harm if they are both enjoying the experiance,tiels are usually very friendly social birds.How old is Ty? I am assuming he is not too young to realise he needs to be gentle with the bird.My advise is to let the tiels wings grow untill he can fly and then if you need to get an avian vet to clip him properly.In the mean time read up all you can on cockatiels and their care so you can dispense of asking at the bird farm.If they are clipping your bird every other week, that is not right. Feel free to ask on hear any questions you have and I am sure you will get very good advise and help.