Please do not take this as an offence. But when you say they "work" for you, what does that mean? Is your definition, they exsist together? or are they successfully producing babies?
You see, you seem to be doing what andrew does, your saying they (groups) work, yet, for you they have not worked(no recruitment) Or have they?
In my experience, over many years is, you can recieve more babies from a pair, then from a trio. This statement is about average over time. I have had some great results with groups and trios. But somehow, always something happens to the groups. Many of our successful groups dwindle down to pairs after only a couple years. Others simply fail.
This is not saying its the monitors fault, or that they never live/exsist/breed, in groups in nature. Or you cannot do that. Its only that because of OUR limitations, we as keepers seem to cause failures. I believe its a very simple cause and effect, we simply do not offer and continue to offer proper resources.
Time is so very important, because it reveals your weaknesses. For instance, its very difficult to support a multiclutching female, even during one season, muchless season after season. That is multiplied my the number of individuals in a cage. How many times do you not feed, is more important then how many you do. In a group that is disasterous. You now have three, four, five starving individuals, instead of one or two. The chances of something bad happening is far greater.
As advanced keepers, you and I think its fairly simple to keep a monitor alive. We even think its simple to breed them and get eggs. We also understand how to allow individuals to be compatible, Yet, getting eggs that make babies is a little more complicated. Now to get females that produce offspring year after year. That is a very meaningful and telling result. But getting females in groups to multiclutch successfully(hatched healthy babies) year after year is the answer to this. That Jody is the difinition of working.
So, please understand, I love your approach, I love the passion and work you put in, but understand, there is suppose to be something on the other side of the equals sign,
1(male) 1(female)= X(viable offspring). That is a successful equation.
1(male) 2(female)=2X(viable offspring)That is successful.
2 3=3X, etc. This too is successful
2 4=1.5X, this is not successful.
2 4=0 or 1 3=0 or 1 5=0 these are incomplete equations, no results. They did not work.
An even goofier way to understand this is. 1 2 is suppose to result in a higher number then, 1 1. 1 2 > 1 1, If a group does not exceed the result of a pair, then it cannot be considered successful. 1 2 < 1 1. Please remember, i understand the animals are not numbers, but after years of results, the results can be measured in numbers. These numbers define "results"
You surely can say, you keep groups together without problem, but its another thing altogether to say they "work" because you have not shown that part of the equation. Thanks for reading FR