Should I Slow Down Vs a Donk?
 

I'm honestly confused if I should give villain credit for a better hand after the PFR. Should I cap every street with this set not filling?

Party Poker 0.5/1 Hold'em (9 handed) converter

Preflop: Hero is UTG with 4[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img].
Hero calls, UTG+1 calls, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP3 raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls, Hero calls, UTG+1 calls, MP1 calls.

Flop: (12 SB) 4[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, UTG+1 calls, MP1 calls, <font color="#CC3333">MP3 raises</font>, SB calls, BB folds, <font color="#CC3333">Hero 3-bets</font>, UTG+1 folds, MP1 calls, <font color="#CC3333">MP3 caps</font>, SB calls, Hero calls, MP1 calls.

Turn: (14.50 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP1 calls, <font color="#CC3333">MP3 raises</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, MP1 calls, <font color="#CC3333">MP3 caps</font>, SB calls, Hero calls, MP1 calls.

River: (30.50 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP1 folds, <font color="#CC3333">MP3 raises</font>, SB folds, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP3 caps</font>, Hero calls.

Final Pot: 38.50 BB

Re: Should I Slow Down Vs a Donk?
 

I definitely go to war like you did. Hard to imagine a preflop raise with something like A3 (though you called him a "donk" in the subject....)

Re: Should I Slow Down Vs a Donk?
 

This is mainly why I ask, he's a donk, not a maniac. Like.. he's the donkiest of the donks. I've never seen someone play better. But he doesn't raise ANYTHING. I just couldn't figure out if a donk would PFR with A3 or 55. (Or maybe one of the turn and river cards.)

So, since this isn't a player who will just cap with anything, will a total donk play AA or KK like this often enough?

Re: Should I Slow Down Vs a Donk?
 

Even donks like to go crazy with AA. I've seen guys keep pushing their aces into 2 raisers on four-flush boards because they're aces.

Unless he would raise 55 (which I doubt he would), you're the best here. I'd cap every street on this board.