
If you have them your brothers and sisters by the same parents are usually from different litters (in humans singletons are the norm, and multiples less common) :D
So yes they are brothers and sisters, as opposed to LITTER brothers and sisters!
If they have one same parent, then just like 3 of my siblings they are half brothers and sisters, and in my case not step brothers and sisters that some people insist on calling them!!
Edited fro speelling and added:
I also will say 3/4 brother or sister when they have same parent, and the other parents of both are have a parent in common. You find quite a lot of those as some males daughters combine well with a particular male.
It gets even more complicated, as if you have used th3e same male say ona mother and daughter, then their puppires will be half siblings and Aunt/Neice or Uncle/Nephew to the others! :D :D :D