Jon Arbuckle has done so little tapping he makes Dilbert look like Porfirio Rubirosa. (That was for the really old folks.)
Anyway, I just joined this forum after Bup alerted me to this thread. The thread is much funnier than the strip, and it reminds me of the only funny Cathy strip ever: the one in which she “is in the bathroom giving the copier repairman a swirley.” Of course, it was funny only until I learned that a swirley was not a knobjob.
The more I think about it, the more obvious it is that it couldn’t possibly be meant to be semen. Even Jon Arbuckle wouldn’t be stupid enough to mistake a cup of semen for a cup of coffee, because the two liquids have completely different colors, plus coffee isn’t that thick. (I’m assuming dog semen looks like human semen – I wouldn’t know.) I’m sure it was meant to be a cup of some dark-colored liquid that looked like coffee – probably some medicine for pregnant dogs. (Obviously, this wouldn’t actually make Jon give birth to a litter, but then again, neither would semen.)
Semen, like blood, is pretty much the same no matter what it comes out of.
Red rocket!
As long as it originated on this planet, anyway. 
There’s something way too matter of fact and knowing about this statement for it not to be errie in a Hannibal Lectur kind of way.
<shivers>
spit take
Okay, let’s be honest.
Liz is just making the “healthy puppy” comment to distract from the fact that she is bending over and tempting Jon to “hit her”.
There. I said it.
It does. Trust me.
Tastes pretty much the same, too.
Or so I’ve heard.
Yeah. I’d say you pretty much don’t want to know.
doo dah, doo dah…
/totally stolen from some SDMB thread I read a long time ago
In Soviet Russia, dog sperm smokes you!
Okay, I hate to be a buzzkill but since everyone is trying to analyze the actual intent: 23 years in the veterinary business and I am not aware of any specific doggie pre-natal vitamins. (Although there may be some marketed to dog breeders.) HOWEVER, there is a common vitamin-iron supplement that is coffee-colored but it smells like liver, not coffee. So maybe Mr. Davis had a pregnant dog that was prescribed this supplement and he assumed it was for just pregnant dogs so he used the “healthy litter” comment for the punchline.
The “steamin’ cup of fido jizz” bit is much funnier.
Wile E wrote:
I seem to recall that he’s allergic to cats. Wouldn’t that usually mean he’s also allergic to dogs?
Not necessarily, people can be allergic to cats but not dogs.
Anyway, I was only speculating. He could have been at a friend’s home and saw their dog vitamins. He could have gone to a pet store for research and saw some dog vitamins. He could have served a guest some coffee and the guest spit it out and cried “Bleargh! That tastes like my pregnant dog’s vitamins!”.*
*Disclaimer: I am not impugning Mr. Davis’ coffee making skills, I am only speculating.
Oh no. You’re merely suggesting that something about his coffee may have inspired what appears to be a joke about dog semen.
I think it’s probable that the cup didn’t contain anything but coffee. The cup is indeed a coffee cup, so, as others have observed, the odds are against the contents being anything animal related.
It’s well established in the strip that Liz thinks Jon is a disgusting creep and a pain in the ass, so she probably just said what she said about the puppies to freak him out and teach him not to go gulping down things that don’t belong to him.
Look again; it has no handle like a coffee cup. It could be any kind of cup, even a specimen cup, for all the detail a comic strip shows.
Methinks Mr. Davis has bigger problems than his coffee skills.
BTW, one of the Google ads tells us of a bowel cleansing system.
Bwahaha!
