diff --git a/lottie-ios/Classes/AnimatableLayers/LOTLayerView.m b/lottie-ios/Classes/AnimatableLayers/LOTLayerView.m
index 20cdca69d2..8c82cdf1af 100644
--- a/lottie-ios/Classes/AnimatableLayers/LOTLayerView.m
+++ b/lottie-ios/Classes/AnimatableLayers/LOTLayerView.m
@@ -315,6 +315,12 @@
   }
 }
 
+- (NSString*)description {
+    NSMutableString *text = [[super description] mutableCopy];
+    [text appendFormat:@" model: %@", _layerModel];
+    return text;
+}
+
 #if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
 
 - (void)_setImageForAsset {
diff --git a/lottie-ios/Classes/AnimatableProperties/LOTAnimatableColorValue.m b/lottie-ios/Classes/AnimatableProperties/LOTAnimatableColorValue.m
index eb5684864f..51a57185bd 100644
--- a/lottie-ios/Classes/AnimatableProperties/LOTAnimatableColorValue.m
+++ b/lottie-ios/Classes/AnimatableProperties/LOTAnimatableColorValue.m
@@ -32,7 +32,7 @@
     if ([value isKindOfClass:[NSArray class]] &&
         [[(NSArray *)value firstObject] isKindOfClass:[NSDictionary class]] &&
         [(NSArray *)value firstObject][@"t"]) {
-      //Keframes
+      //Keyframes
       [self _buildAnimationForKeyframes:value];
     } else {
       //Single Value, no animation
diff --git a/lottie-ios/Classes/Models/LOTComposition.m b/lottie-ios/Classes/Models/LOTComposition.m
index 4f58a49292..8624caf9a7 100644
--- a/lottie-ios/Classes/Models/LOTComposition.m
+++ b/lottie-ios/Classes/Models/LOTComposition.m
@@ -53,6 +53,7 @@
   }
   
   [_assetGroup finalizeInitialization];
+
 }
 
 @end
diff --git a/lottie-ios/Classes/Models/LOTLayer.h b/lottie-ios/Classes/Models/LOTLayer.h
index f45c89d48b..ce4fe25ff8 100644
--- a/lottie-ios/Classes/Models/LOTLayer.h
+++ b/lottie-ios/Classes/Models/LOTLayer.h
@@ -30,7 +30,7 @@ typedef enum : NSInteger {
   LOTMatteTypeNone,
   LOTMatteTypeAdd,
   LOTMatteTypeInvert,
-  LOTLayerTypeUknown
+  LOTMatteTypeUnknown
 } LOTMatteType;
 
 @interface LOTLayer : NSObject
diff --git a/lottie-ios/Classes/Models/LOTLayer.m b/lottie-ios/Classes/Models/LOTLayer.m
index 30731f6014..ed5e3dc389 100644
--- a/lottie-ios/Classes/Models/LOTLayer.m
+++ b/lottie-ios/Classes/Models/LOTLayer.m
@@ -37,7 +37,6 @@
   _layerName = [jsonDictionary[@"nm"] copy];
   _layerID = [jsonDictionary[@"ind"] copy];
   
-  
   NSNumber *layerType = jsonDictionary[@"ty"];
   _layerType = layerType.integerValue;
   
@@ -90,7 +89,7 @@
   
   NSDictionary *position = ks[@"p"];
   if ([position[@"s"] boolValue]) {
-    // Seperate dimensions
+    // Separate dimensions
     _positionX = [[LOTAnimatableNumberValue alloc] initWithNumberValues:position[@"x"] frameRate:_framerate];
     _positionY = [[LOTAnimatableNumberValue alloc] initWithNumberValues:position[@"y"] frameRate:_framerate];
   } else {
@@ -162,4 +161,11 @@
   [_anchor remapPointsFromBounds:_layerBounds toBounds:CGRectMake(0, 0, 1, 1)];
 }
 
+- (NSString*)description {
+    NSMutableString *text = [[super description] mutableCopy];
+    [text appendFormat:@" %@ id: %d pid: %d frames: %d-%d", _layerName, (int)_layerID.integerValue, (int)_parentID.integerValue,
+     (int)_inFrame.integerValue, (int)_outFrame.integerValue];
+    return text;
+}
+
 @end
diff --git a/lottie-ios/Classes/Models/LOTShapeGroup.m b/lottie-ios/Classes/Models/LOTShapeGroup.m
index f91056ec96..b1fed60814 100644
--- a/lottie-ios/Classes/Models/LOTShapeGroup.m
+++ b/lottie-ios/Classes/Models/LOTShapeGroup.m
@@ -63,8 +63,21 @@
   } else if ([type isEqualToString:@"tm"]) {
     LOTShapeTrimPath *trim = [[LOTShapeTrimPath alloc] initWithJSON:itemJSON frameRate:frameRate];
     return trim;
+  } else if ([type isEqualToString:@"gs"] || [type isEqualToString:@"gf"]) {
+    // gs = gradient stroke
+    // gf = gradient fill
+    NSLog(@"%s: Warning: gradients are not supported", __PRETTY_FUNCTION__);
+  } else if ([type isEqualToString:@"sr"]) {
+    NSLog(@"%s: Warning: star is not supported. Convert to vector path?", __PRETTY_FUNCTION__);
   }
+  
   return nil;
 }
 
+- (NSString*)description {
+    NSMutableString *text = [[super description] mutableCopy];
+    [text appendFormat:@" items: %@", self.items];
+    return text;
+}
+
 @end
diff --git a/lottie-ios/Classes/Models/LOTShapeTransform.m b/lottie-ios/Classes/Models/LOTShapeTransform.m
index 37f678be80..3d842a57e7 100644
--- a/lottie-ios/Classes/Models/LOTShapeTransform.m
+++ b/lottie-ios/Classes/Models/LOTShapeTransform.m
@@ -66,6 +66,18 @@
     _opacity = [[LOTAnimatableNumberValue alloc] initWithNumberValues:opacity frameRate:frameRate];
     [_opacity remapValuesFromMin:@0 fromMax:@100 toMin:@0 toMax:@1];
   }
+  
+  NSString *name = jsonDictionary[@"nm"];
+  
+  NSDictionary *skew = jsonDictionary[@"sk"];
+  BOOL hasSkew = (skew && [skew[@"k"] isEqual:@0] == NO);
+  NSDictionary *skewAxis = jsonDictionary[@"sa"];
+  BOOL hasSkewAxis = (skewAxis && [skewAxis[@"k"] isEqual:@0] == NO);
+  
+  if (hasSkew || hasSkewAxis) {
+    NSLog(@"%s: Warning: skew is not supported: %@", __PRETTY_FUNCTION__, name);
+  }
+  
 }
 
 - (NSString *)description {