The Paw Point Rewards online and the In Store points Program work at different ratios since the online prices include certain discounts and fees automatically.

For the Paw Point Rewards you earn 8 points for every dollar you spend before taxes in every item available and you are able to redeem 5$ for every 5000 points you accumulate.(There are four tier of redemption depending on how many points you have) 

For the In Store Program you earn 1 point for every dollar you spend before taxes in any item in regular price (sale items are excluded)  and you are able to redeem 5$ for every 500 points you accumulate.(There are four tier of redemption depending on how many points you have) 

Due to the different ratios points can not be merge and must be used either online or in store. 

Free Bag Program is also not usable online. It can only be used in brick and mortar locations.