Quoting LovelyLilMama:" Lately, my 3mo old seems to be eating less & less. I try and keep him eating every 3hrs or so, but he ... [snip!] ... few days! Is my supply going away? Is he dehydrated? 10hrs seems like a VERY longtime with hardly any pee! Any suggestions?! "
10 hrs without pee does seem a long time but I'm no professional, our LO's are the same age and DS is sleeping a lot at the moment, they go through a growth spurt at 12ish weeks.
I would pump if you're worried. I BF and DS is having longer time in between feeds now though.
I would get some advice.