How To Introduce A New Kitten To Another Kitten?

Q: Last year I bought a male kitten. He was only about 6-7 months old at the time and was already neutered. The same day, my sister gave birth to another female kitten. Now, one week later they are inseparable! They play fight with each other constantly, groom each other’s ears all the time (even in front of us), sleep in our bed together every night, look out for one another around the house — it is amazing how attached these two kittens have become in just a few short weeks!

I want to introduce them to each other but don’t know how or where to start? Should I try putting them together under supervision? What would be best for their development? Is there any special food that needs feeding during this introduction period? Does anyone have advice on introducing 2 cats into an already established home environment please??

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