On what Stage of development You can idtroduce new animals without risk of fights...
If I have small group on just weaned animals can I introduce other weaned from different group to them ??
Yes.
I've also found that if you need to introduce another female or a male into an already established colony, it works best to add a freshly weaned little one.
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0.1 Dog (Truffles)
0.1 Naked Cat (Mercedes)
1.0 Hamster (Pumpkin)
1.1 Bumblebees (Satyana & Weedle)
0.3 Normals (Shayla, Rita and Althea)
0.1 100% Het Pied Ringer (Avalon)
1.0 Pied (Monsieur Piederoff)
1.0 Lesser 100% Het Albino poss het OG (Tinersons)
0.1 Spider Albino (Ivy)
0.1 Mojave Cinnamon (Morticia)
1.1 Normal BCIs (Damon and Conga)
0.1 Crested Gecko (Natasha)
0.0.1 Rosehair Tarantula (Charlotte)
0.0.1 P.Metallica
0.0.1 A.Avicularia
0.0.2 P.Irminia
0.0.1 L.Parahybona
0.0.1 N.Coloratovillosus
?.?.? ASFs