Snow leopard cubs usually do not open their eyes until about a week after birth.
For the first two months they rely solely on their mother’s milk, eating meat as they grow stronger.
The keepers have Pari and the litter living apart from Koshi until they reach an age where they will be ready to meet.
They said this behaviour was natural, with the mother taking responsibility for raising the offspring.
Lucy Petrie said “While the cuteness is an excellent reason to be excited, it’s even better for the snow leopard population, which is decreasing in the wild.
“These new faces are going to be great ambassadors for their wild relatives, helping raise awareness of the challenges this beautiful and enigmatic species face every day.”