This can show up anywhere from a few weeks of age and up to the fourth month of life. (newkidscenter.com)
We provide our barn cats with a cozy «cat condominium» to live in for the first few weeks of life in their new location. (straycatblues.org)
And then there's my friend who discovered, after weeks of living with a crying baby, that she literally wasn't letting down enough milk and she absolutely had to supplement. (articles.chicagotribune.com)