Well, I don't guess they are exactly advanced questions, but not the same one that have been beat to death forever... I would love to see a discussion about some of the things that we improve over time to increase efficiency and lower cost for our businesses.

It is easy to simply produce rodents and there are lots of different ways to do it, but there are specific chores and equipment that we change and upgrade after doing it for a while that refines our particular setups to better fit our needs. These things are the ones that are seldom talked about I guess due to the fact that there are not a whole lot of people that stick with it long enough to evaluate and make changes. Anyhow, here's a few things that I'd like to know the "how do you do it?". (Most of these topics may be more related to med-large scale breeding programs producing 1000+ per month.)

1. (regarding freezing for sales or use) How do you decide when to pull what size for euthanasia? Do you have certain days for certain sizes? Do you have certain racks dedicated for sizes? other thoughts?
ex: I have recently divided my mice racks into sections. Each section is for a particular size rodent. I've stocked the "pinky" secton with 2.10, "fuzzy" is 1.6, "hopper" is 1.4, and the rest is 1.3.... This works well so that I can accurately predict how many of what size I will freeze each month. However, it causes me to have to freeze every day (atleast the pinks and fuzzies).

2. (equipment for euthanasia) We all know that a 5 gallon bucket or similar injected with CO2 (gas or dry ice) will serve as a killing chamber. The topics are... For those of us who euthanize hundreds at a time, what type of enclosures or custom made equipment do you use? What do you use to supply the CO2? What methods do you use in order to keep the rodents as clean and free from urine and feces produced when euthanizing batches?
ex: This is an area that I need major improvement on. I am still using a modified 5 gallon bucket and a paintball cylinder. This method is expensive and time consuming. I don't freeze alot of rats right now (mostly just mice) or I would have given that up long ago. I am imagining a lidded polypro tank or HDPE tote about 2ft x 2ft with a removable wire mesh floor and a shallow catch pan underneath fed by a welding type cylinder.

We'll stop there for now. I have more, but that's enough for one thread, may have a "part 2" later. Lets see what you guys are doing related to these topics. Thanks for your input.