Should I be betting all 3 streets here? And as played do I call that very large river bet?

$0.1/$0.25 No Limit Holdem
6 players
Converted at

Stacks:
UTG ($24.65)
UTG+1 ($7.25)
CO ($22.40)
BTN ($43.25)
Hero ($25.25)
BB ($24.40)

Pre-flop: ($0.35, 6 players) Hero is SB [4c]
2 folds, CO calls $0.25, BTN calls $0.25, Hero calls $0.15, BB checks

Flop: [7h][4s] ($1, 4 players)
Hero checks, BB bets $0.25, CO calls $0.25, BTN calls $0.25, Hero raises to $1.75, BB folds, CO calls $1.5, BTN folds

Turn: ($5, 2 players)
Hero bets $3, CO calls $3

River: ($11, 2 players)
Hero checks, CO bets $11, [i][color=#777777]Hero ???

Call it? Hell raise all in as played, you have two pair in a 6 max game and should be playing for stacks.

Next time bet more on the turn and shove the river

At least call.

Your flop raise has to be bigger. The pot's $1.75 when it gets to you. Make your raise at least $2.50. The turn couldn't be more of a blank, so bet big potatoes. Or at least 4/5 pot. That'll leave him with a slightly less than pot-size bet to call on the river. Which he will with A8 and other assorted junk.

To paraphrase something Iceman said, "The plaque for the alternates is in the ladies' room. Also, if you check-raised to flop to build a pot, why'd you bet the turn small?"

If he had A9, you now have a nice read.

Another similar hand:

$0.1/$0.25 No Limit Holdem
5 players
Converted at

Stacks:
UTG ($22.00)
CO ($22.75)
BTN ($11.70)
Hero ($41.85)
BB ($8.55)

Pre-flop: ($0.35, 5 players) Hero is SB [6s]
2 folds, BTN calls $0.25, Hero calls $0.15, BB checks

Flop: [Qs][9h] ($0.75, 3 players)
Hero checks, BB checks, BTN checks

Turn: ($0.75, 3 players)
Hero bets $0.75, 1 fold, BTN calls $0.75

River: ($2.25, 2 players)
Hero bets $2, BTN goes all-in $10.7, Hero ???

I still call hand 2, despite JT getting there as there are a lot of lower 2pair combos he could have, he could be shoving any ace, or he could be bluffing.