The adult pigeon will not produce any milk after the 7th to 9th day of hatching eggs. So by now the parents have probably only been feeding it what ever you have been feeding them. Some pigeon pairs forget to keep feeding there young after a week, 2 weeks etc. (bad pigeons or first time they have ever raised squabs ( still learning things )) I am sorry I do not know what is in the kaytee complete feed you are using. But if it were me, I would feed it what you were feeding the adults. I have seen people just take a small jar, put a cloth over opening, cut a slit in the cloth covering the opening and put the squabs beak in the opening and he should do the rest. If he doesn't get the idea to drink right,or you are not giving him water, make pigeon pellets or chicken mash/pellets soft with water and do as above. Hope this helps and good luck.