Using a child’s safety gate or just a screen door to separate pets that are about to become roommates helps them to see and sniff each other making their eventual introduction go with ease.

When you pass the evening,
do not expect the morning,
and when you pass the morning,
do not expect the evening
and take from your health your sickness
and from your life for your death
- IBN OMAR -

Habit is a habit and not to be flung out of the window
by any man, but coaxed downstairs one step at a time
- MARK TWAIN -

Take everything you like seriously except yourselves
- Rudyard Kipling -