"We have cats and dogs."

Translation: Vi har katter och hundar.

[seventwelve81]

-er versus -ar:

Must one simply memorize that katt takes -er and hund takes -ar?
Aside from both being one-syllable words, is there any other way to know/predict the plural forms? (I'm trying to better understand the 'Tips and Note's section).

[Zmrzlina]

For many single-syllable words that end in a consonant, it's a matter of learning it by heart.

[seventwelve81]

Tack!

[tahscenery]

I guess because it is easier to memorise single-syllable words and their conditions/states?

[tahscenery]

I'm still a little confused - how do I really make a noun plural? What suffixes do I need to know, and what rules do I also need to consider?

[aterav]

Hmm, did you roll down the page of this section?

[ScaryCombat88350]

change with "vi har katter, inte hundar!"

[ScaryCombat88350]

It should be "we do not have dogs, but we have a cat"