"Μερικοί σκύλοι πίνουν νερό τώρα."

Translation: Some dogs are drinking water now.

[UralMasha]

Can I translate "Μερικοί σκύλοι" as "several dogs"?

[jaye16]

Not really. "Μερικοί" just tells us there were dogs. "Several" show that there were many dogs.

[chari288242]

Is the "now" necessary when there is the gerund "are drinking" in that sentence?

[jss.___]

Τώρα means 'now'.

[KalST]

"Now" can be inserted in more than one place, including after "are"

[jaye16]

Good catch. We've added "Now some dogs..." and "Some dogs are now drinking..." Thank you.

[Jon345104]

A few is ok yes