hey everyone! i was wondering about how long it takes for and RI in bp's to progress? i'm pretty sure my little guy has one

He's making squeaking noises will every breath and sometimes makes popping noises- i think it came from inconsistent humidity levels. otherwise he's acting completely normal and eating well (he just did 4 days ago). he is 2 and half years old

I first noticed very slight squeaking every so often beginning two weeks ago and since then he's only started the popping noises in the last couple days. it's definitely not normal for him, but it seems like 2 weeks is a really long period of time for an RI to get going? is it possible that he doesn't have one bc of this+symptoms? i wouldn't know, so i thought i'd ask!