The moslems invading Western Europe and Hispanics invading the United States don’t have these problems. They eat their pets to feed their 8 kids.
Actually, Spengler ( David Goldman ) argues that Muslims too have a demographic problem.
See here:
Fertility, Faith, and the Decline of Islam: Strategic Implications
Perhaps in their home countries they have to. Once they're here, there's no need to eat the family pets when they have food stamps and earned income credits to feed their innumerable offspring.