if i were you i do not dare to mix around other animal with cats. even cat and cat fight.

cats are very unpredictable. they can be very nice at one point. even when you play and pat them, they will sometime scratch you.

remember, cats are originally from the Lion, Tiger, Chetah, etc etc family  they are a good hunter, and very good in catching preys (bird, mice, bugs, etc.)

and im afraid your guinea pigs will feel more stress to see cats 

that's just a photo... i'm afraid with dog.. if i capture one photo standing next to a dog with smiling face, will it show that i love and not afraid of a dog? 

don't try that at home limie.. im afraid you will never see your GP anymore 

its very hard to predict which male cat will eat kittens... but it is better to keep your female cat with her kitten is secure place if you have other adult cat. like i mention before, cat is a hunter, they hunt anything that make them feel suspicious and curious. even if they play, a cat intend to accidentally hurt or injured their friend (other cats).

a friend of mine, he have about 4 kittens.. one of them injured in the eyes, and become blind one side. that kitten is adult cat now, i think about 1 year plus old...

not only male cat, female cat can become very aggresive towards small kitten. i have done some research on this, i put kitten age 1 month old with my adult cat... one of the male cat seem to be ok, and don't bother about it. the others will start hissing. and one of them actually slap that kitter ehehehe they want to see what creatures is that small and want to see if that small kitten will attack them back cat can be funny sometimes some adult cat get freak out to see kitten

but again, don't try this at home 

i have like 10 cats... hmmmm not included the rescue kitten and cat. 

no lah, my house doesnt have that meow sound that much only can here they bang on something, playing and running

yes i normally will bring back the injured cat home, but will not meet my other cats.. they will be in their room if a new cat need help. im in a process to kidnap this 1 adult cat, that look so pity.. always pass by my house.. but very hard to catch. he got some dry skin (almost like kurap) around his ears and neck. i'm not sure whose cat is this, but im sure belong to someone else he won't be lepak around here if nobody give food.

lucky its not like 100 strays need help here eheheh.. just small number...

there's even one lost kitten last time, scratching my door around midnight. i freak out.. guess what, he is a loyal kitten now very very loyal... that's why i like saving or rescue kitten/cat because they appreciate me and their life better. when ever i walk around the house.. they will come and great you although you are no longer keep them. i always touch by a cats rather than a human around me. weird...

i have 3 orphan cat that i raise since 10 days all right... they are are still with me.. this 3 orphan are so different than other of my cats... they thank you for saving their life, and didn't ask more than that. it is ok for them if i didn't attend them.. all 3 brother and sisters has the same behavior and attitude, they don't complaint much, they eat whatever you gave them..... different from my other cat, if i didn't accompany them, they will become so "mengada-ngada" eheheheh..