Thank you both for your replies and recommendations.

Before I saw any of this, last night I cleaned every single rat tub and put fresh bedding. I haven't been filling it 1/2 way, more like 1/4 - 1/3 of the way, but this time I filled the pine 1/2 way.

I didn't realize that I had 6 males in a tub and 5 in another, so I switched them up to 4, 4 and 3.

After cleaning all those tubs, I made a strong mix of pyrethrin + water and sprayed it all over the floor, and corners of the room. I also put a no pest strip in there with them. They are all in a 15x15 foot cement garage type room attached to my house.

I'll take some pics tonight of my setup, so y'all can see.



Do you think I need more ventilation then the ceiling fan? What type of fans do you have in your rat rooms?

Do you guys do a bedding change after each rat births a litter, or do you still wait the 7 - 10 days for a normal change out? I can imagine all the blood can add to my smell issue.