What do you think happened to my barn kittens?

Yesterday, my family and I were out of town for most of the day. Today when i went to do my chores, all of my barn kittens were gone! The adults are still there but each and every kitten was gone! I asked my mom who had been out there earlier if she saw any of them. She said no. I went up again this evening and the same thing no kittens. We've had a lot of kittens this year, 9 in total so I'm wondering if maybe the humane society found out and came yesterday. But I assure you all of them are fed happy and healthy like most barn cats. One Kitten though has a bit of a sick looking Eye that I've been treating with medicine for that purpose (but the humane society probably doesn't know that) one person that knows about them is very against having so many cats (even though her family has near 20 dogs) but she found out about them a few weeks ago you'd think she wouldn'v told the humane society sooner. Another possibility is the Tom. The father of all 9 kittens visited yesterday And today I'm worried maybe he killed them but that doesn't make any sense maybe he might kill the Tom kittens but why would he kill the females? Plus he is such a sweetie! Last year when one of my adults was a kitten he would play with her like a mother cat plays with her kittens. She was his duaghter too. He is the only Tom around here.I know of. Another possibility is dogs. My neighbors moved away but yesterday for some odd reason they returned they have two vicious toy breed dogs who have attacked my dog in the past. But all the doors to the shed were closed so I don't think they could've gotten in. However the kittens do come outside but it seems unlikely that they could catch and kill all of.them. I still think the Tom could get in though because he is perfectly capable of squeezing in most cats are I see it all the time. I could also see my neighbor with the dogs telling the humane society bit how she'd find out exactly how many I have is a mystery to me but she a lot still see I had a lot