I brewed a peanut butter chocolate milk stout all grain about 2 and half weeks ago. I used pb2 for the peanut butter, one lb of lactose and grain and hops. The og was at 1.061. I pitched a smack pack of ale yeast and nothing happened. After four days I pitched some dry yeast saleale 04 and nothing happened. I took a reading yesterday and the sg was at 1.061. I rehydrated another safeale 04 yeast in warm water waited 25 min and pitched. As of now nothing is happening. I will check the sg tomorrow. I dont know what to do. I can see one or two yeast being bad but three? There are no odd odors coming from the wort. It smells like malt and yeast. The only issue during the brew was in the mash tun. The temperature of the mash tun was 150 when I sealed it. I use an igloo cooler. I think the problem could be the long starch chains didnt convert into simplier sugars for the yeast. But I dont know. Is there anyway I can save my batch? Is there anything I can do besides dumping it? I have more yeast but I am reluctant to pitch more into it? Any help would be appreciated.