Gorgeous new kitten P (now 9 wks) has come to us eating Whiskas kitten pouches combined with Lidl dry food mixed in. We are feeding him the same for now.
He has a vet check on a Friday and first vaccinations.
His poo really stinks and he farts a fair bit which also stink. My plan is to get him into higher quality dry food eventually (probably iams kitten) but I heard he also needs wet food at this age.
So to take advantage of all your great knowledge, my questions are:
How quickly can I swap him over?
Does he need wet food at this stage?
If he needs wet, will a better quality one reduce the stink?
Obligatory kitten pic attached 
Thanks very much.