Never ever ever put your child through a VCUG without sedation. It will ruin your relationship with your child forever.
I was 5 when I went through it, they didn't tell me what they were going to do and my father forced my arms behind my head. It's torture. Pain doesn't describe how painful it is. I remember everything like it was yesterday and not a day has gone by in 22 years that I don't remember it. I dream about it, I'm haunted by it.
Long story short I didn't get over it. I never trusted my father or doctors again and I was very fearful of strangers after that. I'll never go near a urologist, I'm 28 and I've never had a Pap smear: I'd rather die a natural death from cancer that let anyone go near my vagina with a metal object. All because of one day when I was 5.
Anyone who says it's worse for the parent than the child has no idea what they're talking about. The parent doesn't leave the room scarred for life. The parent doesn't experience PTSD afterwards.
I had a vcug done when I was five. I am 24 now. They tramatizedme. They didn't even let my mother hold my hand or be in the room. It made me very sick and the doctors didn't even care. It traumatized my mother as well. I found out years later I was dangerously allergic to contrast dye. Can you believe they caused me allergic reaction and lied about it. One doctor even thinks I have damage from the procedure when I was young. They have got to find something better to do on children. Personally, I wouldn't want my dog treated this way. My mother was also traumatized. There are other option they can do while they are asleep. I had a similar problem to your child and also gained weight. They told us everything was fine when I was five. But when I was ten it came back when I was 10. They say I have a bladder problem. That's what the test is suppose to show.