Silly question about food

Hello to everybody. Just a quick question to ask about 'floating
pellets' for goldfish. Does this not go against everything I have ever
read about feeding goldfish? Would this not encourage swim bladder
problems? I went to my local Petco and they were the only pellets I
could find. Very confused.

Going on Vacation soon for 2 weeks and was going to get an automatic
feeder for the 55g. Problem there is my Ryukin is suffering from what
I guess is constipation as she floats on and off. I starve one day a
week and have cut feeding down. So I thought that maybe I'll just get
my friend to come over a few times during my vacation and give them a
measured amount. The problem I now have is my single fry. He will be
about 7-9 weeks old by then so think that he might be a bit young for
infrequent feeding. Was also worried about his water changes. The 55g
will be done before we go away and my friend is going to take a couple
of gallons off and add some aged water in there. The Fluval is so good
that I have faith it will be ok for the 2 weeks. The little 10g with
the fry in will have a filter working by then but as he is so small I
am worried about her scooping him up. Feel like a new mom. I suppose
5 weeks from now he is going to be a whole lot bigger so am probably
worrying prematurely.

Any help with this neuroticism greatly recieved
Mellie