Normally the vet will give vaccine + deworm for about RM40 - RM55 each dose (depending on location). Klinik veterinar will be much cheaper maybe RM10-RM20. They will sell you the deworm medicine for RM5.00 but you have to feed it yourself. Leceh sangat sebab ubat cair
Maybe your kittens not used to the food. Why don't you feed the RC Kitten? It's more suitable for their age and easy on kitten digestion :)